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Compound materials, consisting of temperature proof glass fiber fabrics and a laminated aluminum layer, are compared in relation to material thickness in the range of up to 200°C to investigate their ΔT behavior under convection heat transmission and radiant heat. Two different technologies for production of 300°C materials are presented, and their advantages and disadvantages are explained. Supported by measurements, this article describes the dependence of the material tensile strength on temperature and temperature cycling.

Different heat shielding unilayer materials already in practical use and multilayer materials, consisting of a compound of E-glass fabric laminated with aluminum foil and different high temperature felts, are compared with regards to the difference between the external and internal surface temperature ΔT as a function of the external surface temperature. Beside that the general difference between the two standard methods convection heat measurement and radiant heat measurement is shown. Especially it is evaluated whether the radiant heat measurement method is suitable to make a general statement for classification of heat shielding materials.